Dust collector



July 8, 1930. R. A. GOODHUE DUST COLLECTOR Filed D80. 18, 1928 2 Sheets-Sheet 2 R 0 Y 5 600D/7Uf Inventor Atlome y Patented July 8, 1930 t not a eoonnun; or SPOKANE, wesnme'ron nUs'r corrnc'ron 1 Application filed December 18, 1928. semimi. seesaw.- v

My present invention relates to anim- 'k-provedy dust collector-which, while adapted for-separating dust or small particles from air-currents 111' general, is particularly de 5 signed-forzuserin-the recess of desiccatmg' liquidsubstances as m1 k. In the process of desiccating milk by the removal of'the moisture and: delivering the solids therefrom, where air currents are employed in the separation process and the solids are dried to powder form, the air currents as they are freed to the atmosphere carry away with them the fines or the finest of the powdered solid. Usuall the fines are so light that they escape from t e drier, but they possess a value sulficient to justify their reclamation or recovery from the laden air currents, and the urpose of my invention is to recover these nes and restore them to the system in which the 2 desiccatingis proceeding, thus insuring a complete recovery of the solids from the moisture of the milk.

In carrying out my invention the dust laden air currents, as they come from the usual collector and drier, are passed through a filter or separator in which the coarsest dust is separated from the air currents, which are usually hot air currents; then the air currents are filtered, washed, or sprayed to remove the finest dust remaining; the air currents are freed; and the ultimate dust is liquefied and returned to the supply of milk that is to be desiccated. While I have referred to the process as that of treating milk, it will be understood that the dust collector may be used inconnection with other processes involving the separation of dust from the laden "air currents of any suitable nature.

In the accompanying drawings I have illustrated one complete example of the physical embodiment of my invention in which the parts are combined and arranged accordin devised or the practical application of the principles of my invention. Figure 1 is a perspective view, with parts broken away from convenience of illustraz on, showing an embodiment of my inven- 1on. 59 Figur 2 i a perspective view, partly brovbarrel or other receptacle 3.

to the best mode I have thus far,

ken away, of the air filter for separating the coarser dust.

Fi re 3 is a vertical sectional view of the lique er for recovering the finest of the dust from the dust-laden air currents before the are freed to the atmosphere. v

Figure 4 is a view in elevation, with parts in section, of the cooler for the liquefied dust.

Figure 5 is a vertical longitudinal sectional view at the discharge end of the filter or separator disclosing the baflie plates near the outlet from the filter casing.

Figure 6 is a detail perspective view showing the manner of supporting some of the filter plates in the filter-separator, and Figure 7 is a similar detail view at the upper end of such a plate.

In order that the general assembly, relation of parts, and utility of my invention may readily be understood I have shown in Figure 1 a pipe 1 with dust laden air currents therein which conveys the solidsto the drier or cyclonic collector 2, in which collector the major portion of the solids are separated from the air currents and de osited in the usual practice, the air currents pass out through the discharge pipe 4 and the fine dust, too fine to settle in the collector, passes out as waste to the atmosphere. r

By the utilization of the device and apparatus of my invention the dust laden aircurrents pass from the discharge pipe 4 through anintake pipe 7 to the interior of the filten separator casing 5 and from there the air currents pass through the outlet pipe 8 to the liquefier 6. The casing 5 is supported on the floor F above the collector 2, and access 7 may be had to the interior of the casing by means of doors as 9, 10 and 11 in one side thereof.

Within the entrance to the casing 5 a screen 12 is provided which is preferably fashioned of cheese cloth or fabric of large mesh to rform the functions of a bafiie for the dist carried by the air currents. The baflie is hinged at its u per 'ed e 13 and the lower edge 13' of the aflie is co so that the bafile y Sway to d is und lse 9? the arranged, ba

- so that the screen may air currents for the purpose of dropping to the floor ofthe casing any dust or powder that may bestopped by the bafile.

After passing the baflle the dust laden air currents encounter a plurality of sets of angular, foraminous screens 14;, arran ed in transverse rowsgth'ree rows here being s own, and each row is madeup of a suitable num-' ber of the angular screens. The screens are of V-shape formation in horizontal cross sec-' d tion and they stand in vertical planes in the casing so that their angular portions are staggered, thus insuring a tortuous passage of the dust laden air currents throu h the succeeding sets of screens for a most e ective I casing at its'op 'osite ends. At'their lower ends the sets 0 screensare supported on a transversely extending, vertica ly arranged, flat bar 19 havin flan ed ends-fixed tojthe opposite side wal of t e casing. 1011 their upper edges these flat bars are fashioned with s aced notches '19, and on'their lower edges t e'angular frames 15 are provided with complementary notches said pair of'notches cooperating to retain the screen, but loosely, vibrate orsha'ke, and thus release an dust that might tendto settle thereon. 'lhe sleeves 16 are also loosely engaged on the rods17'to permit shaking or vibrating the screens," but' the s'creensof each set are retained against operative displacement, and may be adjusted relatively one to another. 7

A set of agigularly disposed, transversely e 1plates 21 is also arranged ad acent the out et end of the casing 5, the set being arranged in a vertical plates of the set being incline (plane and the so that the dust laden air currents will strike the under sides of the plates to free the air currents of; finer dust that passes through the filtering-v screens.

The casing is provided with a tapering bottom 22 for the dust seiparated from the alls by gravity to air currents, and the dust a discharge pipe 23, whence itpas'se's into a barrelorother receptacle 24, and is thus re covered. The casing itself, or the screens, may be shaken to release the accumulated dusttherefrom in suitable manner.

After leaving the filter casing, by way of the outlet pipe 8, the air currents pass through this pipe to the casing 6, said pipe 8 entering the casing near its bottom or lower end in order that the air currents may ascend through a shower or spray of water from a spray device 25 having a number of spray nozzles 25 through which the water is discharged in a shower that fills the cross area of the casing. The air currents thus ass upwardly through the casing, but the ust carried by the currents is shower and dissolved by; the shower. of water.

Water or liquid is supplied to the spray device through pipe 26 t at enters the cylinncal casing near'its'upper end, and the spray device is located in an elevated position in order to secure a material fall for gatheredbythe falling 7 the shower as it gathers the dust, in the liquefier.

A'fter ascending through the atomized or sprayed water,

the air currents, whichihave substantially bee freed of-thedust, strikea? I set of bafile plates 27 in the form o fia louvre.

The plates are V-shafe in cross section, ex-- tend transversely o the and the." louvre occupies the cross area -of so that as t louvre, any dust remaining in the currents maybe caught byhthe louvre. The air is vented through an annular. openin 28,:beneath ing. Any moistened dust'falling from the baflle plates 27, will with the atomized or spra latter falls to the tapere casin the casing ed liquid, andthe bottom 30 of the with other moistened or dissolved dust elow the spray device.

From .the bottom of the casingthe dissolved dust falls by gravity through an outlet pipe 31 to an u per trough 32 that is fash- 'ioned with a per orated or foraminous bottom' 32'. Theliquid trickles through this perforated bottom to a coil 33 of cooling pipes, and over this coil the liquid passesto outlet pipe 106 a lower trough 34, which has an 35 for-the liquid or fluid.

' 86 eair currents. pass'through the I the conical cap or cover-29o the cas-f pass down through the casing A collecting tank 36 is locatedbelowthe outlet pi '35, and a return pipe 37 having a centre valve 88, is with th s tank, in order that the liquid may be conveyed back to the desiccating system,' m1xedwith the milk if desired, and returned to drier. 2 through pipe 1'. u 7 p A ump 39 is employed to circulate the liquidifor the atomizer or spray device in theic'asing 6. Water is supphedto the pump through'an'intake pipe 40 having .a oontro valved and this pipe, as seen m F1gure 1, is connected to a pipe 42 that-joins the tanlgwithv the casing of the pump. Should the liquid collecting in the tank 36;be too thin or'too fluent for return: tothe drier, the

' valves 37 and 41 may be, closed, and the pu'm then used to return theliquid fromthe tank- 36 to the casingfi, and. this circulation is maintained until the thickness or consistency of the gree as requir by thedrier;v

.Ahand hole 1n the pipe 8 is cl sed by a liquid attains such desired: de-

cap 43, and if necessary, access may be had to the interior of the pipe when the cap is removed.

By means of the treatment to which the air currents are subjected by the appliance of my invention, the hot air currents emerging from the liquefierhave been relieved of substantially all of the dust that escapes from the drier in ordinary practice, and-a material saving in the recovery of this dust is attained or accomplished by the operation of the collecting system of my invention.

Having thus fully descnbed my invention, what I claim as new and desire to secure by Letters Patent is 1. In a separator for dust laden air, the combination with a filter casing havin an air'inlet and outlet and an outlet for dust, of a foraminous bafile within the casing, a

lurality of transversely arranged rows of oramious filters and supports for said fil ters, the individual filters of the rows being V-shaped in cross section and arranged in staggered formation.

2. In a separator for dust laden air, the combination of a casing havin an air inlet and a swin ing, foraminous be e within the inlet, an an outlet and a row of vertically spaced, horizontal, inclined bafile plates adjacent the outlet, and a dust outlet pipe, a plurality of staggered rows of foraminous screen-filters extending transversely of the casing, and supports for said rows of filters.

3. n a system for se arating dust from air, the combination wit a filter having air inlet and outlet and a dust outlet, of a moistener connected with the filter for moistening the finer dust from the filter, said moistener comprising a casing, a liquid atomizing device above the inlet for dust laden air and asupply pipe therefor, an outlet from the moistener and a collecting tank for the liquid, and a pump for returning liquid from the tank to the supply pipe.

4. In a separator for dust laden air, the combination with a moistener casing having an atomizer above its air inlet, a liquid supply ipe to the atomizer, an outlet pipe at the ttom of the casing, and a collecting tank below the outlet pipe, of a pum having an inlet pipe, a discharge pipe mm the pump to the supply pipe, an outlet pipe from the tank to the inlet pipe of the pump, an outlet pipe from the tank, and valves for controlling liquid in said pump inlet-pipe and the tank outlet-pipe.

In testimony whereof I afiix my si ature,

ROY A. GO'OD a. 

